Make sure no other buttons are selected so that the options you select for the line affect only the center vertical line.

请确保未选中其他按钮，以便所选的线条选项仅影响垂直居中线条。

youdao

Draw a vertical line down the center of your notebook paper.

在笔记本的一页的中间划一条竖线。

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Like traditional Korean houses, the kitchen is placed in the center of the whole house to be the vertical and horizontal focal point.

类似于传统韩国住宅，厨房位于整个房子的中心，成为水平方向和垂直方向的焦点。

youdao

Displaced slightly to right so vertical axis aligns with the center of big date display.

FORBES: The Face of Time

Critics compared the model's most distinctive styling element, a vertical grille with a large oval in the center, to a horse collar or a car sucking a lemon.

WSJ: Edsel's Designer Took Flop in Stride